| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | essential for [adj] [noun sg] | 75 |
|
| 2 | essential for [det] [noun sg] | 26 |
|
| 3 | essential for any [noun sg] | 11 |
|
| 4 | essential for any [noun sg] | 11 |
|
| 5 | essential for this [noun sg] | 7 |
|
| 6 | essential for this [noun sg] | 7 |
|
| 7 | essential for effective [noun sg] | 6 |
|
| 8 | essential for effective [noun sg] | 6 |
|
| 9 | essential for good [noun sg] | 5 |
|
